?url_ver=Z39.88-2004&rft_id=10.1134%2FS1560090418010141&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=H.&rft.au=Ullah%2C+H.&rft.aulast=Ullah&rft.title=Polymer+Science+-+Series+B&rft.date=2018&rft.volume=60&rft.issn=15600904&rft.issue=1&rft.atitle=Efficient+Entrapment+of+Oxirane+Ring+Containing+Compounds+in+Thermally+Stable+Poly(urea-formaldehyde)+Polymer+Shell+Wall&rft.pages=20-34&rft.genre=article